For Java MR jobs, there is Apache MRUnit that provides a good way of writing test cases. See http://mrunit.apache.org
On Wed, Dec 26, 2012 at 7:26 AM, jamal sasha <jamalsha...@gmail.com> wrote: > Hi, > I have been using python hadoop streaming framework to write the code and > now I am slowly moving towards the core java api's. > And I am getting comfortable with it but what is the quickest way to debug > the map reduce native code.. > like in hadoop streaming this worked great. > % cat input.txt | python mapper.py | sort | python reducer.py > > If there use to be any coding error.. it use to just throw them off and it > was very fast to debug as you code. > Is there any similar way .. where i dont have to run hadoop jobs to debg and > wait and go thru hadoop logs to see that maybe i miss a semi-colon.. > Thanks > Jamal -- Harsh J
